As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS RUNNING FINE WHEN AIRCRAFT LANDED, ENGINE BECAME ROUGH AND PILOT NOTICED A RISE IN M.A.P. WHEN MAINTENANCE INSPECTED ENGINE FOUND NR 5 CYLINDER HEAD SEPARATED FROM BARRELL. THIS CYLINDER IS A CHROME CYLINDER OVERHAULED BY ECI SOUTH CERMICHROME.